# VERSION: 4.7
# AUTHORS: Diego de las Heras (ngosang@hotmail.es)
# CONTRIBUTORS: ukharley
#               hannsen (github.com/hannsen)
#               Alexander Georgievskiy <galeksandrp@gmail.com>

import json
import os
import urllib.request
import xml.etree.ElementTree
from datetime import datetime
from http.cookiejar import CookieJar
from multiprocessing.dummy import Pool
from threading import Lock
from typing import Any, Dict, List, Union
from urllib.parse import unquote, urlencode

import helpers
from novaprinter import prettyPrinter


###############################################################################
class ProxyManager:
    HTTP_PROXY_KEY = "http_proxy"
    HTTPS_PROXY_KEY = "https_proxy"

    def __init__(self) -> None:
        self.http_proxy = os.environ.get(self.HTTP_PROXY_KEY, "")
        self.https_proxy = os.environ.get(self.HTTPS_PROXY_KEY, "")

    def enable_proxy(self, enable: bool) -> None:
        # http proxy
        if enable:
            os.environ[self.HTTP_PROXY_KEY] = self.http_proxy
            os.environ[self.HTTPS_PROXY_KEY] = self.https_proxy
        else:
            os.environ.pop(self.HTTP_PROXY_KEY, None)
            os.environ.pop(self.HTTPS_PROXY_KEY, None)

        # SOCKS proxy
        # best effort and avoid breaking older qbt versions
        try:
            helpers.enable_socks_proxy(enable)
        except AttributeError:
            pass


# initialize it early to ensure env vars were not tampered
proxy_manager = ProxyManager()
proxy_manager.enable_proxy(False)  # off by default


###############################################################################
# load configuration from file
CONFIG_FILE = 'jackett.json'
CONFIG_PATH = os.path.join(os.path.dirname(os.path.realpath(__file__)), CONFIG_FILE)
CONFIG_DATA: Dict[str, Any] = {
    'api_key': 'YOUR_API_KEY_HERE',  # jackett api
    'url': 'http://127.0.0.1:9117',  # jackett url
    'tracker_first': False,          # (False/True) add tracker name to beginning of search result
    'thread_count': 20,              # number of threads to use for http requests
}
PRINTER_THREAD_LOCK = Lock()


def load_configuration() -> None:
    global CONFIG_DATA
    try:
        # try to load user data from file
        with open(CONFIG_PATH, encoding='utf-8') as f:
            CONFIG_DATA = json.load(f)
    except ValueError:
        # if file exists, but it's malformed we load add a flag
        CONFIG_DATA['malformed'] = True
    except Exception:  # pylint: disable=broad-exception-caught
        # if file doesn't exist, we create it
        save_configuration()

    # do some checks
    if any(item not in CONFIG_DATA for item in ['api_key', 'tracker_first', 'url']):
        CONFIG_DATA['malformed'] = True

    # add missing keys
    if 'thread_count' not in CONFIG_DATA:
        CONFIG_DATA['thread_count'] = 20
        save_configuration()


def save_configuration() -> None:
    with open(CONFIG_PATH, 'w', encoding='utf-8') as f:
        f.write(json.dumps(CONFIG_DATA, indent=4, sort_keys=True))


load_configuration()
###############################################################################


class jackett:
    name = 'Jackett'
    url = CONFIG_DATA['url'] if CONFIG_DATA['url'][-1] != '/' else CONFIG_DATA['url'][:-1]
    api_key = CONFIG_DATA['api_key']
    thread_count = CONFIG_DATA['thread_count']
    supported_categories = {
        'all': None,
        'anime': ['5070'],
        'books': ['8000'],
        'games': ['1000', '4000'],
        'movies': ['2000'],
        'music': ['3000'],
        'software': ['4000'],
        'tv': ['5000'],
    }

    def download_torrent(self, download_url: str) -> None:
        # fix for some indexers with magnet link inside .torrent file
        if download_url.startswith('magnet:?'):
            print(download_url + " " + download_url)
        proxy_manager.enable_proxy(True)
        response = self.get_response(download_url)
        proxy_manager.enable_proxy(False)
        if response is not None and response.startswith('magnet:?'):
            print(response + " " + download_url)
        else:
            print(helpers.download_file(download_url))

    def search(self, what: str, cat: str = 'all') -> None:
        what = unquote(what)
        category = self.supported_categories[cat.lower()]

        # check for malformed configuration
        if 'malformed' in CONFIG_DATA:
            self.handle_error("malformed configuration file", what)
            return

        # check api_key
        if self.api_key == "YOUR_API_KEY_HERE":
            self.handle_error("api key error", what)
            return

        # search in Jackett API
        if self.thread_count > 1:
            args = []
            indexers = self.get_jackett_indexers(what)
            for indexer in indexers:
                args.append((what, category, indexer))
            with Pool(min(len(indexers), self.thread_count)) as pool:
                pool.starmap(self.search_jackett_indexer, args)
        else:
            self.search_jackett_indexer(what, category, 'all')

    def get_jackett_indexers(self, what: str) -> List[str]:
        params = urlencode([
            ('apikey', self.api_key),
            ('t', 'indexers'),
            ('configured', 'true')
        ])
        jacket_url = f"{self.url}/api/v2.0/indexers/all/results/torznab/api?{params}"
        response = self.get_response(jacket_url)
        if response is None:
            self.handle_error("connection error getting indexer list", what)
            return []
        # process results
        response_xml = xml.etree.ElementTree.fromstring(response)
        indexers = []
        for indexer in response_xml.findall('indexer'):
            indexers.append(indexer.attrib['id'])
        return indexers

    def search_jackett_indexer(self, what: str, category: Union[List[str], None], indexer_id: str) -> None:
        def toStr(s: Union[str, None]) -> str:
            return s if s is not None else ''

        def getTextProp(e: Union[xml.etree.ElementTree.Element, None]) -> str:
            return toStr(e.text if e is not None else '')

        # prepare jackett url
        params_tmp = [
            ('apikey', self.api_key),
            ('q', what)
        ]
        if category is not None:
            params_tmp.append(('cat', ','.join(category)))
        params = urlencode(params_tmp)
        jacket_url = f"{self.url}/api/v2.0/indexers/{indexer_id}/results/torznab/api?{params}"
        response = self.get_response(jacket_url)
        if response is None:
            self.handle_error("connection error for indexer: " + indexer_id, what)
            return
        # process search results
        response_xml = xml.etree.ElementTree.fromstring(response)
        channel = response_xml.find('channel')
        if channel is None:
            return
        for result in channel.findall('item'):
            res: Dict[str, Any] = {}

            title_tmp = result.find('title')
            if title_tmp is not None:
                title = title_tmp.text
            else:
                continue

            tracker = getTextProp(result.find('jackettindexer'))
            if CONFIG_DATA['tracker_first']:
                res['name'] = f"[{tracker}] {title}"
            else:
                res['name'] = f"{title} [{tracker}]"

            res['link'] = result.find(self.generate_xpath('magneturl'))
            if res['link'] is not None:
                res['link'] = res['link'].attrib['value']
            else:
                res['link'] = result.find('link')
                if res['link'] is not None:
                    res['link'] = res['link'].text
                else:
                    continue

            res['size'] = result.find('size')
            res['size'] = -1 if res['size'] is None else (toStr(res['size'].text) + ' B')

            res['seeds'] = result.find(self.generate_xpath('seeders'))
            res['seeds'] = -1 if res['seeds'] is None else int(res['seeds'].attrib['value'])

            res['leech'] = result.find(self.generate_xpath('peers'))
            res['leech'] = -1 if res['leech'] is None else int(res['leech'].attrib['value'])

            if res['seeds'] != -1 and res['leech'] != -1:
                res['leech'] -= res['seeds']

            res['desc_link'] = result.find('comments')
            if res['desc_link'] is not None:
                res['desc_link'] = res['desc_link'].text
            else:
                res['desc_link'] = result.find('guid')
                res['desc_link'] = '' if res['desc_link'] is None else res['desc_link'].text

            # note: engine_url can't be changed, torrent download stops working
            res['engine_url'] = self.url

            try:
                date = datetime.strptime(getTextProp(result.find('pubDate')), '%a, %d %b %Y %H:%M:%S %z')
                res['pub_date'] = int(date.timestamp())
            except Exception:  # pylint: disable=broad-exception-caught
                res['pub_date'] = -1

            self.pretty_printer_thread_safe(res)

    def generate_xpath(self, tag: str) -> str:
        return './{http://torznab.com/schemas/2015/feed}attr[@name="%s"]' % tag

    def get_response(self, query: str) -> Union[str, None]:
        response = None
        try:
            # we can't use helpers.retrieve_url because of redirects
            # we need the cookie processor to handle redirects
            opener = urllib.request.build_opener(urllib.request.HTTPCookieProcessor(CookieJar()))
            response = opener.open(query).read().decode('utf-8')
        except urllib.request.HTTPError as e:
            # if the page returns a magnet redirect, used in download_torrent
            if e.code == 302:
                response = e.url
        except Exception:  # pylint: disable=broad-exception-caught
            pass
        return response

    def handle_error(self, error_msg: str, what: str) -> None:
        # we need to print the search text to be displayed in qBittorrent when
        # 'Torrent names only' is enabled
        self.pretty_printer_thread_safe({
            'link': self.url,
            'name': f"Jackett: {error_msg}! Right-click this row and select 'Open description page' to open help. Configuration file: '{CONFIG_PATH}' Search: '{what}'",
            'size': -1,
            'seeds': -1,
            'leech': -1,
            'engine_url': self.url,
            'desc_link': 'https://github.com/qbittorrent/search-plugins/wiki/How-to-configure-Jackett-plugin',  # noqa
            'pub_date': -1
        })

    def pretty_printer_thread_safe(self, dictionary: Dict[str, Any]) -> None:
        escaped_dict = self.escape_pipe(dictionary)
        with PRINTER_THREAD_LOCK:
            prettyPrinter(escaped_dict)  # type: ignore[arg-type] # refactor later

    def escape_pipe(self, dictionary: Dict[str, Any]) -> Dict[str, Any]:
        # Safety measure until it's fixed in prettyPrinter
        for key in dictionary.keys():
            if isinstance(dictionary[key], str):
                dictionary[key] = dictionary[key].replace('|', '%7C')
        return dictionary
